usually occur的例句大全

Terrible things usually occur at midnight.

可怕的事情通常在午夜发生。

This class of problems usually occur in many scientific and engineering fields.

此类问题时常出现在许多科学与工程的研究领域内。

Its clinical symptoms are recurrent episodes of wheezing, expiratory dyspnea, chest tightness and cough, which usually occur at night and or in the morning, and could be released spontaneously or with appropriate treatment.

临床上表现为反复发作性的喘息、呼气性呼吸困难、胸闷、咳嗽，常在夜间和或清晨发作，症状可自发缓解或经治疗后缓解。

The breakthrough of gas usually occur during low permeability reservoir development, that lead to recovery efficiency fall.

低渗透油藏注气开发极容易发生气窜，导致采收率降低。

Small precursory events usually occur before strong instability involving the intersecting faults.

涉及交叉断层的较大失稳事件发生前常出现前兆性小事件。

The mutations usually occur in mucous malignant cancer and the mutation rate is increased significantly.

polβ基因突变多发生在粘膜性恶性肿瘤，并且突变发生频率也相对较高。

However, malignancies usually occur when fragments of these tumors are transplanted in other rats.

但如把此肿瘤的组织块移植于其他大鼠则经常表现出恶性.

In many plants, including most tree crops, nitrate nitrogen does not usually occur in the leaves.

在一些植物中, 包括绝大多数的木本作物, 硝态氮并非经常存在于叶片中.

Elastic fibers usually occur as individual, refractile, branching, and anastomosing fibers.

弹性纤维通常是单独的，折光的，分枝的及吻合的纤维。

Tropical cyclones in the Bay of Bengal region usually occur in the non-monsoon months.

该研究指出，在有记录的历史中，印度洋北部首次在2007年6月形成了一场5级热带飓风以及两个更猛烈的热带风暴。孟加拉湾地区的热带气旋通常发生在非季风时期。

systemically investigation has been carried out for three representative boreholes. it indicates that high as groundwaters usually occur in shallow aquifers with dark grey or black fine sand, which deposited in the lacustrine reductive environment.

综合研究了3个代表性钻孔资料，得出：高砷地下水通常埋藏于由灰黑色细砂构成的强还原的冲湖积含水层中。

They usually occur along the boundaries of the thin plates that cover the Earth like an egg shell.

地震一般都在较薄的板块边缘沿线发生，而较薄的板块对地球而言就像鸡蛋壳一样。

Osteoporosis is usually occur concomitantly with arterial calcification in elderly.

众所周知老年患者发生骨质疏松的同时常常伴发血管钙化。

They usually occur during stressful moments, such as when a person is in danger.

它们通常出现在压力大的时候，比如说当人处于危险中。

The valve regurgitate flow usually occur in multiple mainveins in DDVI, and in femoral veins in DVI.

DDVI组发生返流瓣膜组合是以多条大静脉同时出现为主,而DVI组则以单根为主.

II. Inevitable abortion is a threatened abortion with a dilated cervical os. Menstrual-like cramps usually occur.

难免流产是指先兆流产时宫颈口扩大, 腹痛类似于经期腹痛.

Elastic fibers usually occur as individual , refractile, branching, and anastomosing fibers.

弹性纤维通常是单独的, 折光的, 分枝的及吻合的纤维.

flavonoid the largest group of plant polyphenols. these compounds usually occur bound to sugar molecules.

黄酮类物质：植物中最大的一类多酚类物质，常与糖分子结合存在。

flavonoid the largest group of plant polyphenols. these compounds usually occur bound to sugar molecules.

黄酮类物质：植物中最大的一类多酚类物质，常与糖分子结合存在。

Ingrown toenails usually occur in the big toe.

指甲内嵌通常发生在大拇指上.